a hugep notlation. >> reporter: with watches posted from florida to as northascanada, communitiesare getting ready. they're building sand birms to protect whatever mother nature has to uffer and closing seawall in coastal city, maryland, where the mayors are urging labor day weekend vacationers to delay, not cancel the travel plans. >> we expect a quarter of million people coming to the city. what we advise is they wait until the event passes. >> reporter: in the meantime, you can see the rough seas behind me. for that reason, as a precaution, the u.s. coast guard is closing state commercial ports in moorhead city and also in wilmington and ordering vessels to stay in their mooring as a precaution until the hurricane moves out of the waters. >> jim: thank you, and be safe. another offshore oil rig exploded. west of the site where b.p. oil rig did in april. 13 crew members were rescued but one was injured. the rest are said to be tired and hungry. >> it's certainly too early to know what sparked the fire. the coast guard plans to do interview with those rescued to determine the ca